README.md

Order Book

Example way to call with args from console

java -classpath .:target/dependency/* Main "buy 1000 99" "buy 500 99" "buy 500 98" "buy 1200 98" "sell 2000 101"

Example run with built jar file

java -jar target/myartifactid-0.0-SNAPSHOT.jar orders.txt

Test files

orders.txt

orders.txt contain the same data as test, which is first example in Assignment where trades occur There's also test scenario that tests this scenari and proofs it works givenAggressiveSellOrder_whenAddedToOrderBook_thenShouldMatchBuyOrdersInPriceTimePriority orders.txt file

buy 99 1000
buy 99 500
buy 98 1200
sell 101 2000
sell 95 2000

example1.txt

It's file with orders from Example 1 from assignment where multiple orders are added none is matched, it's also covered with test givenOrdersWithNoMatch_whenAddedToOrderBook_thenShouldNotMatchOrders

This is the exact output of example1.txt and it matches requirements:

java -jar target/myartifactid-0.0-SNAPSHOT.jar example1.txt
4,B,99,50000
1,B,98,25500
2,S,100,500
3,S,100,10000
5,S,103,100
6,S,105,20000

example2.txt

This is file which represents Example 2, which is the continuation of Example 1 but then Buy 16000 @ 105p appears. This is output for Example2 which matches requirements too:

java -jar target/myartifactid-0.0-SNAPSHOT.jar example2.txt
trade 2,7,100.0,500
trade 3,7,100.0,10000
trade 5,7,103.0,100
trade 6,7,105.0,5400
4,B,99,50000
1,B,98,25500
6,S,105,14600

orders3.txt

It's file with lots of random orders generated to present the working order book with many orders and trades happening live

Unit Testing

Run mvn test

Building from source

Run mvn install

Demo

assignment-2023-03-17_01.41.32.mp4